I thought there was a request to make the default focus in the search box upon PB starting up. That's how PB3 operated and it was convenient.
Also, can you make changes to the margins in 'Properties & attachment' section sticky. I always seem to be making adjustments there in order to see more of the attachments' file name.
customized Desktop PC (Haswell i7 4770 3.4 gHz with 32 GB RAM), Windows 10 Pro 64-bit, 256 GB SSD, and a Microsoft Surface Pro 6, Windows 10, 512 GB SSD, 16 GB ram, i5